Shore Power Explained: 30A, 50A, and 100A Dockage
By Tal Fox Amit · Jun 21, 2026 · 4 min read
What 30-amp, 50-amp, and 100-amp shore power mean for your boat, and how to make sure a dock can power your vessel.
Shore power keeps your systems running while you're docked, air conditioning, refrigeration, chargers, and more. Matching your boat's power needs to the dock is just as important as matching its length.
30 amp
Common on smaller boats (roughly under 35–40 ft). A single 30A/120V connection runs basic systems and one air-conditioning unit, but can be tight if you run several big loads at once.
50 amp
The standard for most cruisers and larger powerboats. A 50A/240V service (often a four-prong connection) provides far more capacity for multiple AC units, water heaters, and appliances.
100 amp and beyond
Large yachts often need 100A (single or three-phase) or multiple 50A feeds. Confirm the dock provides the right service and connectors for your vessel before you arrive.
Metered vs. included
Power may be included in the rate or metered by usage (common for 50A/100A and liveaboards). On FoxStays, each listing shows the power options, and the quote reflects how it's billed.
Tal Fox Amit
FoxStays Docks · Jun 21, 2026
